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Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.14 ● (Near the limit) 0.2 – 1 0.003 ▲ Total Chlorinemg CL2/l 0.25 No limit 0.05
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 18.2 No limit 18.2 Hardnessmg CaCO3/l 183.5 80 – 459 183.5 Hardness fF 18.4 No limit 18.4 pH 7.55 6.5 – 9.5 7.55 TurbidityNTU 0.11 ≤ 4 0.011 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 471 ≤ 2,500 471 TDSmg/l 301.4estimated 0 – 1,199 301.4 Alkalinitymg CaCO3/l 112.5 No limit 112.5
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0 ≤ 0 0 eColiUFC/100ml 0 ≤ 0 0 BacteriasNMP/100ml 0 ≤ 0 0 EnterococcusUFC/100ml 0 ≤ 0 0
Chemical parameters Chemical parameters Parameter Unfiltered tap water Allowed range Filtered Cyanide totalμg CN/l 10Sampled May 2026 ≤ 50 0.5 Fluoridemg F/l 0.15Sampled May 2026 ≤ 1.5 0.045 Mercuryμg Hg/l 0.5Sampled May 2026 ≤ 1 0.05 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 13.5 ≤ 50 4.05
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 3.9 No limit 3.9 Calciummg/l 67 No limit 67 Potassiummg/l 4.6 No limit 4.6 Chloridemg/l 76 ≤ 250 76
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 10Sampled May 2026 ≤ 200 10 Antimonyμg/l 1Sampled May 2026 ≤ 5 1 Arsenicμg/l 2Sampled May 2026 ≤ 10 1 Bariumμg/l 30Sampled May 2026 ≤ 1,000 30 Cadmiumμg/l 1Sampled May 2026 ≤ 5 1 Chromiumμg/l 5Sampled May 2026 ≤ 50 5 Copperμg/l 54Sampled May 2026 ≤ 2,000 2.7 Ironμg/l 37 ≤ 200 37 Manganeseμg/l 10 ≤ 50 10 Leadμg/l 2Sampled May 2026 ≤ 10 0.1 Nickelμg/l 5Sampled May 2026 ≤ 20 5 Seleniumμg/l 2Sampled May 2026 ≤ 10 2 Sodiummg/l 15.3 ≤ 200 15.3
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled May 2026 No limit 0.005 Total Trihalomethanesμg/l 43.8 ≤ 100 2.19
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 9 ≤ 60 0.45
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005 ≤ 0.4 0.005 Total pesticidesug/L 0.093 ≤ 0.5 0.093
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02 ≤ 70 0.02 Atrazineug/L 0.005 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.007Sampled May 2026 No limit 0.007 PFOSug/L 0.007Sampled May 2026 No limit 0.007 PFNAug/L 0.001Sampled May 2026 No limit 0.001 Total PFASug/L 0.05Sampled May 2026 ≤ 0.1 0.005 PFAS 4ng/l Not reported No limit — PFAS 21ng/l Not reported No limit —
Other Other Parameter Unfiltered tap water Allowed range Filtered Ammoniamg/l 0.02 No limit 0.006 Sulfatemg/l 17.4 No limit 17.4 Uraniumug/L 10Sampled May 2026 No limit 10
Data from the French health inspection of drinking water (Ministry of Health, regional health agencies), per distribution unit. Quality ranges are based on WHO guidelines, EU Directive 2020/2184 and the French public health code.
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Data from the French health inspection of drinking water (Ministry of Health, regional health agencies), per distribution unit. Quality ranges are based on WHO guidelines, EU Directive 2020/2184 and the French public health code.
